Looper-operating mechanism for sewing-machines.



L. ONDERDONK.

LOOPER OPERATING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED SEPT. 10, 1907.

3 SHEETS-SHEET 1.

Patented Feb. 23, 1915.

L. ONDERDONK.

LOOPBB OPERATING MECHANISM FOR SEWING MACHINES.

APPLIOATION FILED SBPT.10, 1907.

Patented Feb. 23, 1915.

3 SHEETS-SHEET 2.

L. ONDERDONK.

LOOPER OPERATING MECHANISM FOR SEWING MACHINES.

I Patented Feb. 23, 1915.

3 SHBETSSHEET 3.

.stitched, while in the needle loop to l on.

' 'nansme ounnnnoivx, or NEW YORK, N. Y., ASSIGNOR T0 uNIoN SPECIALMACHINE.

COMPANY, OF CHIGAG-O, ILLINOIS, A CORPORATION OF ILLINOIS.

LOOPER-OPERA'I'ING MECHANISM FOR SEWING-MACHINES.

specificationof Letters latent. Patented Feb. 23, 1915.

Application filed September 10, 1907. SeriaI No. 392,207.

To all whom it may concern;

Be it known that I, LANSING. ONnnRooNK, a v citizen of the UnitedStates, residing at New York, in the county of New York, State of NewYork, have invented certain new and useful Improvements inLooper-Operating Mechanism for Sewing-Machines, of which the followingis a description, reference being had to the accompanying drawing and tothe letters and figures of reference'marked thereom I v 'My'inventionrelates to new anduseful improvements inlooper operating mecha nism forsewing machines and has for its ob jectto provide a looper operatingmechanism, wherein the'looper is so mounted as to move away from thematerial being assist the needle in setting the stitch.

A further object of my invention is to provide ai machine having a worksupporting post and a continuously rotating shaft with .alooper'mechanism which shall be located in said work supporting post,and positively operated from the continuously rotated shaft. Y i

My invention consists in the parts, im-' provements and arrangementshereinafter described and set forth in the claims.

In the drawingswhich show byway of illustration, one embodiment ofmyinvention: Figure l is a view partly in section,

' the parts thereo showing a worksupporting post, the lower portion ofthe needle head and my improved the looper pulling movement in dottedlines.

Fig. 6 is a detail inside and front elevation of the rock lever of mylooper mechanism. Fig. 7 is a detail view of the looper support, Fig. 8ie'a detail view of the looper carrier,

Fig. 9 is a detail view showing a modified erably of the type shown inmy co-pending application, Serial Number 392,204, filed of even dateherewith, although it is obvious from certainaspects my invention may beusedin connection with other forms of sewing machines.

The overhanging arm of the machine is provided with the usual needlehead 5, at its forward end, in which reciprocates a needle bar 6carrying a needle 7. A presser bar 8 is alsomounted in the needle head5, and carries a presser foot 9 at its lower end. Said presser foot 9normally holds the material upon'the work'support 10, mounted on theupper-end of the work supporting post 4.

The feeding mechanism has been omitted from the illustrated embodimentof my invention, for the sake of clearness.

. The looper carrier 11 is provided with thread carrying looper 12,which is seated in a socket formed in the carrier and secured theretobya suitable screw. Said looper carrier is mounted upon a looper support13, which as shown in Fig. 3, is provided with an outwardly extendingsupporting stud 14 on which the looper carrier oscillates. Said loopersupport is preferably secured to a supporting rod-15 which is mounted insuitable bearings 16, 17 in the upper end of thesupporting post.

The looper support 13 is provided with a downwardly extending arm 18 towhich is secured an extension 19. The'main shaft 3 carries a crank arm20 at its outer end, which is provided with .a ball stud 21. A rocklever 22-is pivoted at 23 to a stud 24 secured tothe work sup ortingcasing. A 7

link 25 is secured to the end and is pivotally'connected at its otherend at 26 to one arm of the rock'lever 22. The other arm of the rocklever 22 is pivoted at 27 to a link 28 which in turn is pivoted $0 aball stud 29, mounted on an all stud 21 at one arm 30 formed in'tegralwith-the looper carrier 11. Y Y

The extension 19 of the looper supporting arm 18 is pivoted at 31 to alink 32, which 6 as shown 1n Figs. 1,2 and {l is pivoted to the link 25at a point .33, intermediate its ends.

In the modified form I have shown the extension 19 on the, loopersupporting arm 18 as connected there "to by a suitable screw 34, andinterlocking rib connections. It is obvious that through may be varied.

. As the main shaft'3 rotates, the crank arm 20 willoscillate. the rocklever 22, which will in turn oscillate the looper carrier upon thelooper support. As the .link is moved up anddown and the lowerend-thereof is carried around by the crank 20, the pivotal connection 20between'the link 32 and said link 25,.will cause said link 32 to moveendwise and vibrate the arm 19 and thus impart a vibration 'to thelooper support; It will be noted that the axis of the looper support 15'is located at one side of the needle path and therefore, as the loopersup-' 85 port is vibrated about its axis, the loopers maybe movedfrom-one sideof the path of the needle to the other side thereof, togive v the needle avoiding movement and at the same time said looperwill be moved toward 40 or from the material. It-will also be noted thatthe axis of the looper of the looper support .15'is supported in therearof the needle path and therefore, the looper in moving to theopposite side of the needle for the needle avoiding movement of thelooper, may be moved away from the material and away from the previousstitch. If the needle loop of theprevious stitch surrounds the looper atthe time the looperis given its needle avoiding movement, a certainstrain will be placed upon said needle loop, which will assist indrawing up the previous stitch;

In the operation of v my needle rises throwing out its'usual needle 100The looper moves forward Into said needle loop and the needle'rises tothe upper end of its stroke. As the needle reaches the upper end of itsstroke the needlethread is p aced undenstrain, which draws the previousstitchtight. At the same time that the needle isreaching the upperendofdts 4 stroke, the looper is moving laterall to avoid the needle onits descent and sai latof my inventionshown, in Fig, 9, I have shownthe' link 32'- 10 connectedtothe crank arm 20 on the main the thisconnection, the length of thearm 19 the loopers in their retractedposition.

"passed by the looperewhile entering the, -..needle. loop andat asubstantial distance from thepathlthereof whereby as thelooper machine,-the '1nto andout oftheneedle looppthe. axis of work supportqtdtightenthestitch. 'j

support on which sai from the material and the previous stitch drawsupon the needle thread which at this time surrounds the looper andassists ma looper retracts shedding the needle loop of the previous.stitch.: ,The "moving of the looper bodily away from the previousstitch to assist the needle in settingithe stitch, is" not claimedherein broadly, as the same forms the subject matter of my co-pending'application, Serial Number 392,206, filed of even date herewith. 5

The bed plate 1 is provided with a thread guiding strlp 35 and a threadguiding strip 36.-is secured to the worksupporting post.) Said threadguiding-strip 36 'has an inwardly extending finger 37 at its upper :end;35 The thread is led underneath the thread guiding strips 35 and 36 andpasses through the work supporting post directly in rear of The loopers12, 12, as shown in Fig. 8, are set in the carrier 11 so that theirshanks are in a line substantially'parallel with the body of saidloopers. The right hand looper 12 in Fig. 8'is provided with an'ofit'setportion whereby said shanks maybe so located. This oflset. portion ofthe outer looper 12 has an opening therethrough for the vthread of theinner looper.

Having .thus' particularly described "my invention, what I claim as newand desire to secure by Letters Patent is 1. The combination of a worksupport, a

the needle, and means for moving the looper;

into and out of the needle 'loo the axis of said looper support being atright angles to the needle path and on the side of the ,needle isoscillated laterally it is moved away 'from the work sup ort to tightenthe 'stit'ch. 2. The com ination of a work support, aneedle, a looper, asupport for said looper, means for oscillating said. support wherebysaid looper may be swunglaterally to avoid the needle,and means .formoving the looper 120 said looper support being disposed'at right anglesto the path of the needle and at a .substantial distance in the rear ofthe-pathof the needle, whereby as the looper is} 0s; I cillatedlaterall' it is moved awayfrom the I3. The com ftion'ofa work supports;needle, a ldoper'f'a loo er carrier,-'a looper v carrier is pivoted, 19means for ope at ng said l per carrier and means for oscillating saidlooper :support, whereby the looper may be moved laterally to avoid theneedle, the axis of said looper.

support being disposed-at right-anglesto the path of the needle and at asubstantial.

a pair of needles, a looper for each needle,

11 looper carrier on which said loopers are mounted. a looper support onwhich said carrier is. pivoted, means for oscillating the loopercarrier, and means for oscillatmg the looper support whereby the loopersmay be moved laterally to avoidthc needles, the

it is moved away from tho-work sup-:-'

rier form'oring the looperinto and out of axis of said looper supportbeing located at" right angles to the. path of the needle and entirelyat one side of the path of both of said needles, whereby as said loopersare moved laterally, they are moved away from the work support.

The combination with a bed plate, of a work supporting post, a loopermounted in said work supporting post, a or carrier, a looper support onwhich saic carrier is mounted, a rotary shaft extending into said worksupporting post, and means carried by the end of said shaft foroscillating said looper carrier, said means including a link and meansconnected to said link for oscillating said looper support.

(3. The combination with a bed plate, of a work supporting post, alooper carrier, 0. looper mounted in said work supporting post, a loo ercarrier, a looper support on which saic carrier is mounted, a rotaryshaft. extending into said work supporting post and means operated fromthe end of the shaft for oscillating said carrier, said means includinga rock lover, a link connecting said lever to the operating means on theend of the shaft. and means operated by said link, for oscillating said100 or support.

7. The combination of a bed p ate, a work supporting post risingtherefrom, a looper mounted in said work supporting post, a loopercarrier, a looper support, on which said carrier is pivoted, a rotaryshaft extending into said work supporting post, a crank arm thereon. arock lever pivoted within said work supporting post, a link connectingsaid rock lever tosaid crank arm, a second link connecting said rocklever to said looper carrier, and means operated from said link betweenthe rock le ver and the crank arm for oscillating said looper support. Y

8. The combination with a bed late, a work sup orting post risinguthererom, a needle, a ooper, a support-forthelooper mounted in said worksupportingffpost, a looper carrier mounted on-said looper' support,means for oscillating said looper ear said rock itheneedle-loop,and'means for oscillating said looper support for moving thelooper late ally when in the necdleloop, the axis 1 of said loopersupport "being at right angles to the needle ath' and on the side of thencedle'passed By the looper while entering the needle loop andfat asubstantial distance from-the-path thereof whereby as the looper isoscillated laterally when in the needle loopit-is movedaway from thework support so as to assist-.in'tightening the stitch.

9. The combination with a bed plate, a work supporting post risingtherefrom, a work supportcarried by said post, a rotary shaft extendinginto said work supporting post, a crank -armon the end of said rotaryshaft-,a link connected thereto, a looper support mounted in said worksupporting post, a looper carrier mounted on said support, a loopercarried by said carrier, means intermediate said link and said loopercarrier for oscillating the same and means intermediate said link andsaid looper support for oscillating said support.

10. The combination of a bed plate, a work supporting post risingtherefrom, a rotary shaft extending into said work supporting )ost, acrank arm on the end of said rotary s aft, a looper support mounted insaid work supporting post, a looper carrier mounted on said support, alooper carried by said carrier, a rock lever mounted in said work suporting post a link connecting ever to said looper carrier, a linkconnecting said rock lever to said crank arm, and means for oscillatingsaid looper support.

11. The combination with a bed late, a work supporting post risingtheretrom, a rotary'shaft extending into said work supporting 0st, acrank arm on the end of said rotary emit, a looper support mounted insaid work supportingpost, a looper carrier mounted on said support, alooper carried by said carrier, a rock lever mounted in said worksupporting post, a link connecting said rock lever to said loopercarrier, a link connecting said rock lever to said crank arm, an armcarried by said looper support, a link intermediate said arm and saidlast named link, for oscillating said support.

12. The combination with a vertical work supporting post, a looperarranged therein, and at right angles to the line of feed, a threadguiding strip extending up the side of said work supporting 0st, to aposition directly in rear of said ooper, when said looper is retracted.

13. The combination with a looper carrier, of a-plurality of looperscarried thereby, the bodies of said loopers being parallel and theshanks of said loopers being set in said carrier; in a line parallelwith the bodies of said looper, the offset portion 0'! one of saidloopers beingFrovided-with an 7 opening through which other looperpasses.

e 1 thread of the 14. In a sewing machine, the combination with a framecomprising a base, .an overhanging bracket-arm and a hollowworksupportmg post rising from said base, of an versely of the axis ofoscillation,-a 1ooper-- supporting bar arranged-in the upper part ofsaid post and upon which said looper is mounted to oscillate, meansconnected with said shaft for imparting oscillatory loopseizing andshedding-f movexnents to the looper,-and means also connected with saidshaft for tilting the looper-supporting bar through a range of'inovementwith extreme positions withma quadrant limited at one side by a lineparallel with the needle-path, whereby the looper blade is givensidewise and "substantial rising and falling movements.

In testimony whereof I afiix my signature, in presence of two witnesses.

' LANSING ONDERDONK.

Witnesses:

WALTER I'IARTLEY, FRANKLIN H. CHILTON.

Copies of this patent may be obtained for an cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

